Optically assessed contents of leaf polyphenolics and chlorophyll as indicators of nitrogen deficiency in wheat (Triticum aestivum L.)

Cartelat, A.; Cerović, Zoran G.; Goulas, Y.; Meyer, Sylvie; Lelarge, Caroline; Prioul, JL; Barbottin, Aude; Jeuffroy, M. H.; Gate, Philippe; Agati, Giovanni; Moya, I.

doi:10.1016/j.fcr.2004.05.002

Cited by 335 publications

(270 citation statements)

References 55 publications

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“…This agrees well with results from Agati et al [58]. Several authors have reported that FLAV correlates with the flavonoid levels in fruits [13,[60][61][62]. Cartelat et al [13] found a negative correlation between flavonoid levels and chlorophyll content in wheat.…”

Section: Could Nitrogen Deficiency Stress Be Detected By the Sensors?supporting

confidence: 82%

“…Red Edge Inflection Point (REIP), NDVI, Modified Chlorophyll Absorption in Reflectance Index (MCARI), Greenness Index (G), Optimized Soil Adjusted Vegetation Index (OSAVI), an index from Zarco-Tejada and Miller (ZM), Photochemical Reflectance Index (PRI) and Normalized Phaeophytinization Index (NPQI) have been shown to correlate with nitrogen stress, including nitrogen deficiency, in maize and wheat [10,15]. Similar results are obtained by fluorescence indices (Table 2) [13].…”

Section: Introductionsupporting

confidence: 69%

“…Several authors have reported that FLAV correlates with the flavonoid levels in fruits [13,[60][61][62]. Cartelat et al [13] found a negative correlation between flavonoid levels and chlorophyll content in wheat. All in all concerning nitrogen deficiency, both the spectrometer and the fluorometer were able to detect nitrogen deficiency.…”

Section: Could Nitrogen Deficiency Stress Be Detected By the Sensors?mentioning

confidence: 96%

“…The applicability of spectrometers and fluorometers has been investigated for single stress factors like water shortage, nitrogen deficiency and weed identification in a series of crops especially wheat [5][6][7][8][9][10][11][12][13][14]. Nitrogen deficiency can result in slower growth rate, smaller plants and reduced yield.…”

Section: Introductionmentioning

confidence: 99%

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Using Optical Sensors to Identify Water Deprivation, Nitrogen Shortage, Weed Presence and Fungal Infection in Wheat

et al. 2016

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Abstract:The success of precision agriculture relies largely on our ability to identify how the plants' growth limiting factors vary in time and space. In the field, several stress factors may occur simultaneously, and it is thus crucial to be able to identify the key limitation, in order to decide upon the correct contra-action, e.g., herbicide application. We performed a pot experiment, in which spring wheat was exposed to water shortage, nitrogen deficiency, weed competition (Sinapis alba L.) and fungal infection (Blumeria graminis f. sp. tritici) in a complete, factorial design. A range of sensor measurements were taken every third day from the two-leaf stage until booting of the wheat (BBCH 12 to 40). Already during the first 10 days after stress induction (DAS), both fluorescence measurements and spectral vegetation indices were able to differentiate between non-stressed and stressed wheat plants exposed to water shortage, weed competition or fungal infection. This meant that water shortage and fungal infection could be detected prior to visible symptoms. Nitrogen shortage was detected on the 11-20 DAS. Differentiation of more than one stress factors with the same index was difficult.

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Section: Could Nitrogen Deficiency Stress Be Detected By the Sensors?supporting

confidence: 82%

Section: Introductionsupporting

confidence: 69%

Section: Could Nitrogen Deficiency Stress Be Detected By the Sensors?mentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Using Optical Sensors to Identify Water Deprivation, Nitrogen Shortage, Weed Presence and Fungal Infection in Wheat

et al. 2016

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“…Indeed, the model based on the pluviothermic index presented by Fournier et al (2015) shows that, in the same climatic conditions between the open-floral stage to harvest, Fruitlet Core Rot incidence is lower than Leathery Pocket. On the other hand, it can be suggested that fertilisation influences fruit characteristics involved in fruit resistance, such as fruit flesh fragility, translucency, which is increased by high N mineral fertilisation (Py et al, 1984), and fruit antioxidant system defence provided by phenolics (Cartelat et al, 2005). It would be useful to evaluate the impact of various types of fertilisation on Low-input pineapple crops with high quality fruit 299 pineapple phenolics, as was recently done by Larbat et al (2014) on tomato and who observed that an N shortage increased several phenolic contents.…”

Section: Organic Fertilisation Reduces the Incidence Of Leather Pockementioning

confidence: 99%

Low-Input Pineapple Crops With High Quality Fruit: Promising Impacts of Locally Integrated and Organic Fertilisation Compared to Chemical Fertilisers

2016

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SUMMARYFruit and vegetable farming generally involves high levels of chemical inputs despite the fact that consumers are increasingly concerned about the sanitary and organoleptic aspects of fruit quality. Pineapple is largely subject to these issues since it is dominated by conventional monocropping with high levels of agrochemical inputs due to nitrogen (N) and potassium (K) fertilisation, weed management, crop protection and flowering induction. However, low-input pineapple cropping systems are both rare and little documented. Our study aimed at replacing all or part of the chemical fertilisers used with local organic fertilisers. It was conducted on the cultivar 'Queen Victoria', without pesticides or herbicides, in Reunion Island. We compared the impacts of three fertilisation treatments on pineapple growth and yield, fruit quality traits, symptoms of two major fungal diseases in fruit and production costs and labour times: (i) conventional: NPK fertiliser at recommended doses (265.5 kg ha −1 N-10.53 kg ha −1 P-445.71 kg ha −1 K); (ii) integrated: Mucuna pruriens green manure (240.03 kg ha −1 N, 18.62 kg ha −1 P, 136.11 kg ha −1 K) incorporated into the soil and a half-dose of NPK fertiliser and (iii) organic: M. pruriens green manure incorporated into the soil and foliar applications of sugarcane vinasse from a local distillery, rich in K (14.44 g L −1 ). Our results showed that NPK fertilisation could be replaced by organic fertilisers as well as by integrated fertilisation. 'D'-leaf analysis showed that vinasse supplies a largely sufficient K level for growing pineapples. With organic fertilisation, pineapple growth was slower, 199 days after planting vs. 149 days for integrated or conventional fertilisations, and fruit yield was lower, 47.25 t ha −1 vs. 52.51 and 61.24 t ha −1 , probably because M. pruriens green manure provided an early increase in soil mineral N, whereas N requirements are much higher four months after planting. However, the fruit weight (709.94 ± 123.53 g) was still within the size range required for the export market (600-900 g). Interestingly, organic fertilisation significantly reduced Leathery Pocket disease and produced the best quality fruit with the highest total soluble solids contents (TSS) and the lowest titratable acidity (TTA). Fruit quality was also significantly improved with integrated fertilisation, with fruit weight similar to that of conventional fertilisation. To conclude, these findings have implications for the sustainability of pineapple production and could lead to low-input innovative cropping systems that reduce production costs and develop local organic inputs.

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UV‐B Resistance of Plants Grown in Natural Conditions

Pescheck

Bilger

2020

Annual Plant Reviews Online

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Plants protect themselves against potentially harmful effects of solar ultraviolet‐B radiation by a variety of mechanisms conferring UV‐B resistance. The underlying resistance mechanisms of a plant can be acclimated corresponding to the prevailing UV‐B exposure in their habitat such that under natural conditions UV‐B damage does not seem to exist. UV‐B resistance is not only induced by UV‐B radiation but to a large extent also by other environmental factors. Here, we review current evidence on how abiotic variables, e.g. low temperature or water deficit, affect UV‐B resistance mechanisms. We are focusing on acclimation of UV‐B screening through the accumulation of UV absorbing compounds, which is well investigated, and on the removal of UV‐B‐induced DNA damage by repair. Although the latter is a resistance mechanism specifically directed to UV‐B‐induced damage, it is strongly underinvestigated. Interaction of UV‐B radiation and other environmental factors can occur at the level of signal transduction chains, most often leading to cross‐resistance. Additionally, the influence of environmental conditions on physiological reactions may lead either to cross‐resistance or cross‐sensitivity.

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Optically assessed contents of leaf polyphenolics and chlorophyll as indicators of nitrogen deficiency in wheat (Triticum aestivum L.)

Cited by 335 publications

References 55 publications

Using Optical Sensors to Identify Water Deprivation, Nitrogen Shortage, Weed Presence and Fungal Infection in Wheat

Using Optical Sensors to Identify Water Deprivation, Nitrogen Shortage, Weed Presence and Fungal Infection in Wheat

Low-Input Pineapple Crops With High Quality Fruit: Promising Impacts of Locally Integrated and Organic Fertilisation Compared to Chemical Fertilisers

UV‐B Resistance of Plants Grown in Natural Conditions

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